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<div class="moz-cite-prefix">On 11/14/2015 3:05 PM, David McGough
wrote:<br>
</div>
<blockquote
cite="mid:Pine.LNX.4.44.1511141954470.18470-100000@goliath.inttek.net"
type="cite">
<pre wrap="">
Hi Pat,
Is this system a BeagleBone Xm or BBB?
If it's a BBB, how are you powering it (e.g.: A DC-DC converter)?? The
BBB is very sensitive to the +5VDC power source and -any- USB related
power spikes can cause the condition you're describing.
73, David KB4FXC
On Sat, 14 Nov 2015, KH6KL wrote:
</pre>
<blockquote type="cite">
<pre wrap="">11.14.2015
I'm not sure which board to post this on...
My repeater is a Motorola R1225, 25Watts, w/ PL. The computer is a
BeagleBoneBlackC. I'm only using the COS, PTT, Rx Audio, Mic and ground.
This system has been working on the AllStar Network since May 2015.
About 2 months ago a weird problem started: The Xm hangs on, but PTT
voltage is at 5v. The URI red led is off. If I just wait the timeout
timer kills the Xm but the the PTT doesn't work until I reset the 1225.
The Rptr Rx led is off the whole time, so there's no incoming signal.
This only happens when the URI is connected to the accessory plug. I put
my spare R1225 on-line and the same thing happens.
Note: I have everything working off of an Astron SS30 power supply. I
looked for ground loops, but didn't find any.
I borrowed an URI and the system worked perfectly. I returned the URI
and put the repeater on-line/stand-alone for two weeks with no problems.
I sent the URI back to DMK engineering and it passed their test, so it
was returned to me. I put it on line and the same problem started again.
I swapped the the two URIs and my machine worked perfectly but the other
machine started to kerchunking by itself. I returned the borrowed URI,
and put my machine on-line/stand-alone.
I would like to know if anyone has had this problem and what was your
solution.
I called DMK engineering to see if they would warranty the URI, no
decision yet, but I ordered a new URI to get this node working.
Aloha,
Pat
KH6KL
</pre>
</blockquote>
<pre wrap="">
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</pre>
</blockquote>
<font size="+1">David,<br>
<br>
The system is a BBBc. I'm using a Murata 78SR-5/2-C, 5V 2A (3A
peak) DC/DC converter.<br>
I have replaced the Astron SS30 with a Linear power supply and the
URI with a new one. System is working except for the audio.<br>
<br>
Thanks for the help.<br>
</font><br>
<pre class="moz-signature" cols="72">--
73 from the Land of the Pakipika...
Aloha,
Pat
KH6KL</pre>
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